Well, I've been waiting for people to talk and hopefully slip up, but no dice. So, here goes.
I'm voting for Johnny.
Of the three candidates, Jacob did vote for a Mafia member last round and he voted for Bairman too, so he's not on that Mafia team. And if he was on the same team as Raven, well, I would think that he wouldn't be as blatant in copying his votes.
I think Tank's argument is shaky, but I don't get the "Tank is Mafia" vibe from him either.
I'll be honest- I'm almost 100% sure that Grant is a citizen. And Johnny's been trying to start a bandwagon against him for the last three rounds. When people stick to the same vote round after round, well, that's suspicious to me. So, my deductions lead me to Jason.